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<pre><span class="sourceLineNo">001</span>package com.palamida.util.collect;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import static com.google.common.base.Preconditions.checkArgument;<a name="line.3"></a>
<span class="sourceLineNo">004</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.4"></a>
<span class="sourceLineNo">005</span><a name="line.5"></a>
<span class="sourceLineNo">006</span>import java.util.LinkedHashMap;<a name="line.6"></a>
<span class="sourceLineNo">007</span>import java.util.Map;<a name="line.7"></a>
<span class="sourceLineNo">008</span><a name="line.8"></a>
<span class="sourceLineNo">009</span>import com.google.common.collect.Maps;<a name="line.9"></a>
<span class="sourceLineNo">010</span><a name="line.10"></a>
<span class="sourceLineNo">011</span>/**<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Static utility methods which operate on or return {@link Map}s.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * <a name="line.13"></a>
<span class="sourceLineNo">014</span> * @author Zhenya Leonov<a name="line.14"></a>
<span class="sourceLineNo">015</span> * @see Maps<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>public class MoreMaps {<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>        private MoreMaps() {<a name="line.19"></a>
<span class="sourceLineNo">020</span>        }<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>        /**<a name="line.22"></a>
<span class="sourceLineNo">023</span>         * Creates an empty {@code LinkedHashMap} with the specified ordering mode.<a name="line.23"></a>
<span class="sourceLineNo">024</span>         * <a name="line.24"></a>
<span class="sourceLineNo">025</span>         * @param accessOrder<a name="line.25"></a>
<span class="sourceLineNo">026</span>         *            the ordering mode - {@code true} for access-order,<a name="line.26"></a>
<span class="sourceLineNo">027</span>         *            {@code false} for insertion-order<a name="line.27"></a>
<span class="sourceLineNo">028</span>         * @return an empty {@code LinkedHashMap} with the specified ordering mode<a name="line.28"></a>
<span class="sourceLineNo">029</span>         * @see LinkedHashMap<a name="line.29"></a>
<span class="sourceLineNo">030</span>         */<a name="line.30"></a>
<span class="sourceLineNo">031</span>        public static &lt;K, V&gt; Map&lt;K, V&gt; newLinkedHashMap(final boolean accessOrder) {<a name="line.31"></a>
<span class="sourceLineNo">032</span>                return new LinkedHashMap&lt;K, V&gt;(16, .75F, accessOrder);<a name="line.32"></a>
<span class="sourceLineNo">033</span>        }<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>        /**<a name="line.35"></a>
<span class="sourceLineNo">036</span>         * Creates a {@code LinkedHashMap} with the specified ordering mode,<a name="line.36"></a>
<span class="sourceLineNo">037</span>         * containing the same mappings as the specified map.<a name="line.37"></a>
<span class="sourceLineNo">038</span>         * <a name="line.38"></a>
<span class="sourceLineNo">039</span>         * @param accessOrder<a name="line.39"></a>
<span class="sourceLineNo">040</span>         *            the ordering mode - {@code true} for access-order,<a name="line.40"></a>
<span class="sourceLineNo">041</span>         *            {@code false} for insertion-order<a name="line.41"></a>
<span class="sourceLineNo">042</span>         * @param m<a name="line.42"></a>
<span class="sourceLineNo">043</span>         *            the map whose mappings this map should contain<a name="line.43"></a>
<span class="sourceLineNo">044</span>         * @return a {@code LinkedHashMap} with the specified ordering mode,<a name="line.44"></a>
<span class="sourceLineNo">045</span>         *         containing the same mappings as the specified map<a name="line.45"></a>
<span class="sourceLineNo">046</span>         * @see LinkedHashMap<a name="line.46"></a>
<span class="sourceLineNo">047</span>         */<a name="line.47"></a>
<span class="sourceLineNo">048</span>        public static &lt;K, V&gt; Map&lt;K, V&gt; newLinkedHashMap(final boolean accessOrder, final Map&lt;? extends K, ? extends V&gt; m) {<a name="line.48"></a>
<span class="sourceLineNo">049</span>                checkNotNull(m);<a name="line.49"></a>
<span class="sourceLineNo">050</span>                final Map&lt;K, V&gt; map = new LinkedHashMap&lt;K, V&gt;(Math.max((int) (m.size() / .75F) + 1, 16), .75F, accessOrder);<a name="line.50"></a>
<span class="sourceLineNo">051</span>                map.putAll(m);<a name="line.51"></a>
<span class="sourceLineNo">052</span>                return map;<a name="line.52"></a>
<span class="sourceLineNo">053</span>        }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>        /**<a name="line.55"></a>
<span class="sourceLineNo">056</span>         * Creates an empty {@code LinkedHashMap} with the specified ordering mode<a name="line.56"></a>
<span class="sourceLineNo">057</span>         * and enough capacity to hold the specified number of entries without<a name="line.57"></a>
<span class="sourceLineNo">058</span>         * rehashing.<a name="line.58"></a>
<span class="sourceLineNo">059</span>         * <a name="line.59"></a>
<span class="sourceLineNo">060</span>         * @param expectedSize<a name="line.60"></a>
<span class="sourceLineNo">061</span>         *            the expected size<a name="line.61"></a>
<span class="sourceLineNo">062</span>         * @param accessOrder<a name="line.62"></a>
<span class="sourceLineNo">063</span>         *            the ordering mode - {@code true} for access-order,<a name="line.63"></a>
<span class="sourceLineNo">064</span>         *            {@code false} for insertion-order<a name="line.64"></a>
<span class="sourceLineNo">065</span>         * @return an empty {@code LinkedHashMap} with the specified ordering mode<a name="line.65"></a>
<span class="sourceLineNo">066</span>         *         and enough capacity to hold the specified number of entries<a name="line.66"></a>
<span class="sourceLineNo">067</span>         *         without rehashing<a name="line.67"></a>
<span class="sourceLineNo">068</span>         * @see LinkedHashMap<a name="line.68"></a>
<span class="sourceLineNo">069</span>         */<a name="line.69"></a>
<span class="sourceLineNo">070</span>        public static &lt;K, V&gt; Map&lt;K, V&gt; newLinkedHashMapExpectedSize(final int expectedSize, final boolean accessOrder) {<a name="line.70"></a>
<span class="sourceLineNo">071</span>                checkArgument(expectedSize &gt;= 0);<a name="line.71"></a>
<span class="sourceLineNo">072</span>                return new LinkedHashMap&lt;K, V&gt;(Math.max(expectedSize * 2, 16), .75F, accessOrder);<a name="line.72"></a>
<span class="sourceLineNo">073</span>        }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span>}<a name="line.75"></a>




























































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